# 帮我生成一个验证是否符合MD5编码格式的Python函数
import re
def is_valid_md5(md5_string):
    """Check if the provided string is a valid MD5 hash."""
    pattern = re.compile(r'^[a-fA-F0-9]{32}$')
    return bool(pattern.match(md5_string))("Server is running...")
        